"Andrey Serbinenko" wrote in message
...
The highest a bird has ever been spotted is about 38,000 msl.

You may find this web-site interesting: http://www.usahas.com/

And there has been a bird strike at 37,000 feet. See this site for some more
interesting facts. I was impressed at the size of the problem.
http://www.birdstrike.org/commlink/top_ten.htm
--
Jim in NC